BatteryMINDer® ABS-248 12/24 Volt battery temperature sensor can double the life of any type of 12V or 24V battery when used properly. It enables your temperature compensated charger / maintainer / desulfator to accurately adjust its voltage to your battery's environment. The ABS-248 At-the-Battery Temperature Sensor remotely informs the BatteryMINDer® of the batteries’ ambient temperature if they are not in the same ambient temperature as the BatteryMINDer®. This is necessary to ensure the correct Charging Profile to prevent over- or under-charging.